Lunate - triquetal instability
Etiology
FOOSH
Rare
Patho-anatomy
| Intrinsic | Extrinsic |
|---|---|
|
Lunate-triquetal ligament - C shaped - volar / dorsal / membranous - volar component strongest
|
Dorsal radiocarpal ligament
Palmar radio-triquetral ligament Lateral Compression
LC-1: pubic rami fracture with sacral fracture
ComplicationsComplications
Subscapularis failure Rotator cuff failure Instability Infection Periprosthetic fracture Aseptic loosening Neurological injury
Incidence
Parada et al. J Should Elbow Surg 2021 - 2224 aTSA complication rate 11%, revision rate 5.6% Atlas / C1 Fractures3 types
1. Posterior Arch
Mechanism - axial compression with hyperextension
Associations - 50% incidence other C1/2 fracture - i.e. ondontoid fracture
Management - stable - soft / philadelphia collar
2. Isolated lateral mass fracture
Mechanism - asymmetrical axial compression / lateral bend ComplicationsGeneral- haemarthrosis - DVT - infection
Septic Arthritis
Incidence Complications1. Infection
Peters et al J Arthroplasty 2009 InstabilityTypes of Instability
1. AP Instability 2. Varus Valgus Instability 3. Global Instability 4. Frank Dislocation
BackgroundDefinition |
